Alexis Sirkia

Captain, Yellow Network

Alexis Sirkia is a pioneer in decentralized finance (DeFi) and blockchain technology. He chairs Yellow, a group of companies developing secure infrastructure that gives access to brokers and banks to safe crypto trading. His background spans aeronautics, space, and financial technology (fintech). Alexis co-founded GSR, a leading cryptocurrency market-making firm that played a role in Ripple's early growth. An award-winning innovator, he's also been recognized for his work on a semantic search engine. Alexis seamlessly blends work and adventure, circumnavigating the world as the captain on his sailing catamaran, all while staying connected 24/7 via Starlink.

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Alexis Sirkia

Latest from Alexis Sirkia

CoinDesk Indices

Crypto Long & Short: Protecting the people building DeFi infrastructure

In this week’s Crypto Long & Short Newsletter, Jennifer Rosenthal writes on the need to protect the people actually building DeFi infrastructure. Then, Alexis Sirkia comments on how Ethereum's L2 strategy is failing due to a fundamental design flaw.

Apr 22, 2026

CoinDesk

CoinDesk Indices

The Web Needs a Better Model

Dominated by platform giants like Amazon and Google, the internet has strayed from Web3’s original vision of decentralization, but innovations like state channels now offer a path back by enabling fast, secure, peer-to-peer interactions without trusted intermediaries, says Alexis Sirkia of Yellow Network.

Sep 24, 2025

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